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Jiang Yue, Jia Manke, Zou Caiqiong, Luo Guangfu, Huang Yingping, Zhang Aiqing. Photocatalytic activity of iodine-doped TiO2 under visible radiation[J]. Chinese Journal of Environmental Engineering, 2013, 7(3): 975-980.
Citation: Jiang Yue, Jia Manke, Zou Caiqiong, Luo Guangfu, Huang Yingping, Zhang Aiqing. Photocatalytic activity of iodine-doped TiO2 under visible radiation[J]. Chinese Journal of Environmental Engineering, 2013, 7(3): 975-980.
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Photocatalytic activity of iodine-doped TiO2 under visible radiation

  • 1.

    Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang 443002, China

  • 2.

    Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, South-Central Univercity for Nationalities, Wuhan 430070, China

  • Received Date: 28/06/2012
    Accepted Date: 09/07/2011
    Available Online: 18/03/2013
    Fund Project:
  • Iodine doped TiO2 and TiO2 were prepared by sol-gel method using n-butyl titanate as titanium source and potassium iodate as iodine source, below 100℃, and then characterized by XRD, TEM, and XPS. The results showed that TiO2 and iodate-TiO2 were both anatase. According to the characterization results, it was assumed that iodine was absorbed and wrapped on the TiO2 surface or inset into interstices, but not entering in the TiO2 lattice. The degradation of Rhodamine B (RhB) and 4-chlorophenol (4-CP) as probe reactions were used to evaluate photocatalytic activity of catalysts prepared under different conditions. The results indicated that iodine-doped TiO2 calcined under 400℃ with molar ratio nI/nTi=0.05∶1 has remarkably higher photocatalytic activity than the undoped TiO2 at pH=7 under the visible light irradiation (λ>420 nm). The degradation process was studied by infrared spectrophotometry (IR) and total organic carbon (TOC), and oxidation species were also detected utilizing benzoic acid by fluorescence analysis method, which showed that ·OH was generated to degrade organic compounds.
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Photocatalytic activity of iodine-doped TiO2 under visible radiation

  • Received Date: 28/06/2012
  • Accepted Date: 09/07/2011
  • Available Online: 18/03/2013
Fund Project:

Abstract: Iodine doped TiO2 and TiO2 were prepared by sol-gel method using n-butyl titanate as titanium source and potassium iodate as iodine source, below 100℃, and then characterized by XRD, TEM, and XPS. The results showed that TiO2 and iodate-TiO2 were both anatase. According to the characterization results, it was assumed that iodine was absorbed and wrapped on the TiO2 surface or inset into interstices, but not entering in the TiO2 lattice. The degradation of Rhodamine B (RhB) and 4-chlorophenol (4-CP) as probe reactions were used to evaluate photocatalytic activity of catalysts prepared under different conditions. The results indicated that iodine-doped TiO2 calcined under 400℃ with molar ratio nI/nTi=0.05∶1 has remarkably higher photocatalytic activity than the undoped TiO2 at pH=7 under the visible light irradiation (λ>420 nm). The degradation process was studied by infrared spectrophotometry (IR) and total organic carbon (TOC), and oxidation species were also detected utilizing benzoic acid by fluorescence analysis method, which showed that ·OH was generated to degrade organic compounds.

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